Phosphoric acid (H3PO4) is the second most produced inorganic acid in volume, after sulfuric acid (H2SO4). It is an important acid used industrially mainly in the production of phosphate agricultural fertilizers.
Phosphoric acid is produced by mining the naturally occurring phosphate rock and processing it most commonly via a wet process.
The concentration of the acids during the wet process can be measured in-line with Vaisala K-PATENTS® Process Refractometer PR-43-GP. The refractometer is installed directly in the process line to provide realtime measurement of the sulfuric and phosphoric acid concentrations, eliminating the need for sampling and laboratory titration tests.
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